FOCUS 5.4 CHEAT SHEET:
A simple way on how to login into FOCUS 5.4 by Joel
Famini
Part 1: Starting up the FOCUS
software:
FOCUS is also available on the
cluster Margaret.geosc.uh.edu and the workstation Dix.agl.uh.edu, the procedure
to start up focus is similar to the one outlined below! You can login to a SUN
workstation and then login to margaret.geosc.uh.edu/dix.agl.uh.edu or
alternatively use Thinanywhere.
1)
Login to any SUN workstation in the computer lab (rm 232, sr1) or alternatively if you are using thinanywhere, start up thinanywhere,
login etc (thinanywhere help is located in another secion, click this link)
2)
When you have entered the Solaris environment, open
up a terminal window. To open a terminal
window, right-click anywhere on the desktop.
When the menu comes up, go to “Tools” ® “Terminal”
3)
Now login to the main department application server
(geossun1), more help can be found here.
4)
After you login to geossun1, you are ready to start
up FOCUS software.
5)
As mentioned during class, at the command prompt,
type in “pgver”.
A listing of environments will be listed. For our case, type in “Epos3”. Epos3 is the environment to run FOCUS 5.4
in. Pg20 is the environment to run FOCUS
5.4
ALTERNATIVELY….
You can just go ahead and type in directly “pgver
Epos3”. The first scenario is in
the case that we have more than one pg environment present.
6)
A message stating: “Your environment has been set
for Epos3” will appear.
7)
Then To invoke the FOCUS program, type in “focus
&”
8)
The main FOCUS menu will appear after a few
seconds.
9)
When a dialog warning box appears regarding the
failure to allocate the color map, just click “OK”. This is just a warning that we only have 256
colors, and will in no way affect the processing sequence.
10) In the FOCUS main window, click “File” ® “New”. In the “Project” dialog box, type in a
project name, i.e. East Breaks. In the
“Title” space, type in a short description of the project. In “Location”, type in a short description of
the location of the data set/project you are going to be working on. There are no controls on what names you
should use, but a good rule of thumb would be to use names and words that would
mean something to you. Finally, select
whether the parameters used in the seismic data are in feet or in meters. Select accordingly.
11) You have now
created a project in FOCUS. The next
step would be to load in the data volume that you will be working on. Since this is probably the first time you
logged into FOCUS, click “Ok” when pressed to select a project since this is
the only project listed there.
12) To start
processing, it would be better to go ahead and download the training manual
shown in class from the path “/pgclass/docs/”. The filename is “basic.pdf”
13) For easier reading, download it to your
Windows PC. You must have the “SSH Secure File Transfer” installed. This can be found in the UH geosciences
website at “support.geosc.uh.edu” and go to “Download Software”. Download and
install in your Windows PC.
14) Once installed, you are now ready to download
the pdf file.
Open “SSH Secure Shell File Transfer”. Press the spacebar to open the
login dialog box. For host name, type in “geossun1.geosc.uh.edu”. For Username,
use your username. Press “Connect”. Type in your password when asked.
15) On the right hand side, there is an address
box you can to type in the path to the file.
Type in “/pgclass/docs/”. The file to download
is called “basic.pdf”. This is the training manual for FOCUS 5.4.
16) To download,
select the file in the box to the right, click on the “ß” up in the tool
bars to download it to folder of your choice in your Windows PC.
This cheat sheet
is designed to help you get around the UNIX environment of the Geosciences
Department and to how to access FOCUS.
Part 2: Setting up a project:
1) After logging in,
you should get to the FOCUS session manager (Figure 1). If you don’t have a project yet, the program
helps you set-up your own seisdata space. The seisdata space
is the area in the network where all the temp files generated during the
processing sequence will be stored.
Figure 1 – The FOCUS
session manager
2) Once you have
set-up the path to your personal seisdata, the
program asks you to start a new line for the project. Click “Yes”.
3) You are now ready
to input a project. Click on the “Data
Management” tab (Arrow in Figure 2).
Click the “Create Descriptor” button.
With this button, you input in the parameters of your seismic data, i.e.
number of stations, sampling rate, data length, etc. You can also set the primary key you want
your data volume to be sorted accordingly.
4) When clicking on
“Create Descriptor,” a series of dialog boxes appears you to guide you
step-by-step on how to input your data.
The first dialog box (Figure 3) is where you input in the path to where
the SEGY data resides. For the class, we
have two data sets to work with. One is
located at /pgclass/UH6331/2D, with the segy file
called “shot.sgy”.
The other file is located at /pgclass/UH6331/sun2D, the file called “field_shots.sgy.”
Figure 2 – The “Data
Management” Tab and the “Create Descriptor” module.
Figure 3 – In this
window, you type in the path to where the data resides.
5) In the next
window, type in the file name you want your segy to be
called when it is converted into PDS format, which is the internal FOCUS file format.
Figure 4 – File to be
created in PDS format.
6) In the next three
windows, accepting the default values given is ok. The first window (Figure 5), the values
represent the EBCDIC header, the Binary header, and the trace byte count.
Figure 5 – Data header
parameter set dialog box.
7) The next window
(Figure 6) is where you set on how the file is encoded in the data. Again, accepting the default values is ok.
Figure 6 – Data encoding
parameters.
8) In the next
window (Figure 7), this is where you set the sample domain, whether it the data
is in Metric or English, the sample rate, and the like.
Figure 7 – Data trace
parameters set-up window.
1) The next window
(Figure 8) is where we set the organization of the data. Again, we can accept the default values
except for the first box, where we set it to be pre-stack, since this is what
we have.
Figure 8 – Data
organization window. For class, we set
the stack mode to “Pre-stack” instead of the default “Post-stack.”
2) The next window
is where you set the number of channels per shot (Figure 9). If you are using the “field_shots.sgy”
data, the number of channels/shot is 48.
If you are using the “shots.sgy” data, the
number is 124.
Figure 10 – Window where
you plug-in the number of channels/shot.
3) In the next
window, push the “Continue” button in the middle of the window. This will bring up a table containing all the
trace headers (Figure 11). Note that
these headers are arranged the way the SEG set-up the SEG-Y convention. So it is highly possible that some of the
headers are not in the place that they are supposed to be. For the class data set, we assume that all
are in the right places. Scroll down the
table until you see the header “SHOT.”
Click on “SHOT” and a window will pop-up (Figure 12). In this window, you can set “SHOT” to be the
primary sort key. Click “OK” and click
“OK” again till you get back to the dialog box that has the “Continue”
button. Click “NEXT” at the bottom.
Figure 11 – Table
containing all the trace headers
Figure 13 - The window where
you can set the primary sort key definition.
4) In the last window (Figure 14), just click
“Finish” and it will read through all the traces.
Figure 14 – The final step
after FOCUS reads through all the traces.
5) To do a
preliminary QC on the data, i.e. if you did it right, go back to the main FOCUS
session manager. Click on the
“Applications” tab and click the “View Data” module (Figure 15).
6) When the “View Data” window comes up, a table
containing all the files will appear.
Click on the file of your choice.
7) CONGRATULATIONS!! You have just set up a project in FOCUS.
Some other issues to note when running FOCUS
-Jay
- On some systems you may see an error
message that - Focus cannot run since one of the screens is in pseudo
color and the other in true color. This happens usually on older
workstations, the solution - switch to a newer system or run focus with
the following option "focus -cm pseudo color", This will force
it to run on pseudo color or better yet use "focus -screens 1"
which will force it to run only on one screen.
- With Thinanywhere you will have to select your color depth
as 8/24 bit multimode, you can do this as follows, or else you will see
color flashing and icons appearing in b/w
